ARRAYS

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ARRAYS

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Title: ARRAYS

1
PHP Array
ARRAYS
?. ??????? ???????? http//www.siam2dev.com ?.
????????????
2
???????? (Array)

??????????????????????????????????????????????
dynamic array ???? vector(???????????????????????)
myarray3
myarray1.1
myarray"abc"
???????????????????? ?????????????????????????????
?????????????
?????????????????????????????????
?????????????????????????? ????
???????????????????? ?????????

3
arr4-1.php3

lt?
myarray0 1
echo "number of elements ".count(myarray)."
ltBRgt\n"
myarray1 "abc"
echo "number of elements ".count(myarray)."
ltBRgt\n"
myarray2 1.3
echo "number of elements ".count(myarray)."
ltBRgt\n"
myarray 1310 // the same as
myarray3 1310
echo "number of elements ".count(myarray)."
ltBRgt\n"
for (i0 i lt 4 i)
echo myarrayi," \n"
?gt

4
??????????????????????????????????????????????

??????????????????????????????????????????????????
??????????????????
???????????????? ????????????????? ????????????
(Run time)
?????? ???????????????????????????????????????????
?array() ????
lt?
arr_11 2000 //arr_1????????????????????
?
arrr_211 4000 //arr_2?????????????????
??
arr_3111 4000 //arr_3???????????????
????
?gt

5
??????????????????????????????????????????????????
??????????

????????
arr_1 array() //???????? arr_1
????????????????
arr_11 72 //arr_1 ?????????????????????

6
????????????????????????????????? Array

???????? array() ???????????????????
??????????????????????????????????
??????????????????????????????????????????????????
????????????????? ???????? array()
???????????????????????????????????? ???????????
comma (,)

7
??????????????????????????????????????????????????
? array()

?????????????? array ( ??????1,??????2,??????3,
..)
????????
arrarrray(10,20,30.30,"PHP","PROGRMMING")
for(r0 r lt count(arr) r)
echo (" index r arr rltbrgt")

8
??????????????,???????? ,????????????????????????
??????

??????????????????????????????????????????????????
??????????????????????????????????????????????????
??????????????????????????
??????????????????????????????????????????????????
?????????????????????
arr"php"
arr10.50

ltHTMLgt
ltHEADgt
ltTITLEgtFigure 5-2lt/TITLEgt
lt/HEADgt
lt?
Cities "San Francisco"
Cities "Los Angeles"
Cities "New York"
Cities "Martinez"
/
count number of elements
/
indexLimit count(Cities)
/
print out every element
/

for(index0 index lt indexLimit index)
print("City index is Citiesindex.
ltBRgt\n")
?gt
lt/BODYgt
lt/HTMLgt

City 0 is San Francisco. City 1 is Los Angeles.
City 2 is New York. City 3 is Martinez.
11
5-3.php3

ltHTMLgt
ltHEADgt ltTITLEgtFigure 5-3lt/TITLEgt
lt/HEADgt
lt?
/
fill in some information
/
UserInfo"Name" "Leon Atkinson"
UserInfo"Location" "Martinez, California"
UserInfo"Occupation" "Web Engineer"

for(reset(UserInfo)
key key(UserInfo)
next(UserInfo))
value pos(UserInfo)
print("key is value.ltBRgt\n")
?gt
lt/BODYgt
lt/HTMLgt

13
?????????????????????? (Multidimensional Array)

????????????????????????????????? ....
???????????????????????? .. .. ..
?????????????????????
arr_211 4000 //arr_2????????????????
???
arr_3111 2000 //arr_3?????????????
??????

14
?????????????????????? (Multidimensional Array)
???

dim 3
for (row0 row lt dim row)
for (column0 column lt dim column)
myarray2rowcolumn 4row column
echo myarray2rowcolumn," "
echo "ltBRgt\n"

ltHTMLgt
ltHEADgt
ltTITLEgtFigure 5-4lt/TITLEgt
lt/HEADgt
lt?
monthName array(1gt"January", "February",
"March",
"April", "May", "June", "July", "August",
"September", "October", "November",
"December")
print("Month 5 is monthName5 ltBRgt\n")
?gt
lt/BODYgt
lt/HTMLgt

16
???????????????????? (associative array)

??????????????????????????????????????????????????
???????????
????? lookup table
???? ????????? "red" ????????? 0xff0000 "green"
????????? 0x00ff00 ??? "blue" ????????? 0x0000ff
???????????????????????? color_table

17
???????????????????? (???)

color_table"red" 0xff0000
color_table"green" 0x00ff00
color_table"blue" 0x0000ff
color_name "red"
echo "value ".color_table color_name."ltBRgt\
n"

18
???????????????????? (???)

???????????????????????????????????????? array ()
?????????????????????????????????????????????????
array () ??????
color_table array(
"red" gt 0xff0000,
"green" gt 0x00ff00,
"blue" gt 0x0000ff
)
????????????????????????????????????

????????????????????????????????????????????????
????
lt?
countries array (
"thailand" gt array ( "zone" gt "Asia",
"D_NAME" gt ".th"),
"malasia" gt array ( "zone" gt "Asia",
"D_NAME" gt ".my"),
"india" gt array ( "zone" gt "Asia",
"D_NAME" gt ".in"),
"holland" gt array ( "zone" gt "Europe",
"D_NAME" gt ".nl"),
"france" gt array ( "zone" gt "Europe",
"D_NAME" gt ".fr")
)
echo "domain name".countries
"thailand""D_NAME"."ltBRgt\n"
?gt

20
???????????? each ??? list ???????????????????????
???

??????????????????????????????????????????????????
?????????????????????? ?????????????????????????
??????? each() ??? list()

21
???????????? each ??? list ???????????????????????
???(???)

unset(a)
a array( "a" gt 10, "b" gt 20, "c" gt 30 )
while (list(key, value) each(a))
echo "keyvalue ltBRgt\n"
???????????? a10 ,b20 ,c30

lt?
// The require function loads and executes the
// specified file. In this case, the dump_array
// function is defined.
require('common.inc')
// Define some scalar variables.
int_number_of_books 20
str_book_title 'Of Mice and Men'
// Define a complex array.
arr_books array(
'number_of_books' gt int_number_of_books
,'lst_books' gt array(
'one' gt array(
'name' gt 'Of Mice and
Men'
)

,'two' gt array(
'name' gt 'Moby Dick'
)
)
)
echo "ltPgtExamples Using Scalar Variableslt/Pgt"
echo "ltULgt"
echo 'ltPgt"There are int_number_of_books
books." '
echo "ltBgtThere are int_number_of_books
books.lt/Bgtlt/Pgt"
echo 'ltPgt"The first book is \"str_book_title\".
" '
echo "ltBgtThe first book is \"str_book_title\".lt
/Bgtlt/Pgt"
echo "lt/ULgt"

echo "ltPgtExamples Using Array Variableslt/Pgt"
echo "ltULgt"
// Show the array to demonstrate its
complexity.
dump_array(arr_books)
// There are several ways to specify array keys
str_key 'number_of_books'
echo "ltPgtUsing a variable as the array
keyltBRgt"
echo 'ltULgt"There are arr_booksstr_key
books." '
echo "ltBgtThere are arr_booksstr_key
books.lt/Bgtlt/ULgt"
echo "ltPgtUsing a bare word as the array
keyltBRgt"
echo 'ltULgt"There are arr_booksnumber_of_books
books." '
echo "ltBgtThere are arr_booksnumber_of_books
books.lt/Bgtlt/ULgt"
echo "lt/ULgt"
?gt

25
??????????????????????????????????

???????? array
??????????????? array array( )
??????????????????????????????????????????????????
??????????????????????????????????????????????????
???????????
test1array() //??????????????????????? test1

26
??????????????????????????????????

???????? array_walk
??????????????? int array_walk(array arr,string
func)
??????????????????????????????????????????????????
?????????????????????????????????????????????
1. ?????????????????????????????????????????????
??????????
2. ?????????????????????????????????????????????
??????????

27
??????????????????????????????????

???????? count
??????????????? void count (array arr)
??????????????????????????????????????????????????
??????????????????????????????????????????????????
?

28
??????????????????????????????????

???????? current
??????????????? mixed current(array arr)
??????????????????????????????????????????????
?????????(pointer)???????(????????????????????????
???????? pointer ?????????????????????????????????
??????)

29
??????????????????????????????????

sortarray(50,40,30,20)
echo current(sort),"brgt" //??????? 50
next(sort) //?????? pointer ???????????????????
echo current(sort) //??????? 40

30
??????????????????????????????????

???????? each
??????????????? array each (array arr)
??????????????????????????????????????????????????
???? ????????????? pointer ???????????????????????
???????????????????????????? ?????????????????????
?????????????????????????????

31
??????????????????????????????????

sort array(5,40,30,20)
get each(sort) /????? sort
???????????????????? pointer ?????????????????????
? get ??????????????????????????????????????? /
echo get0 gt get1 ltbrgt
echo getkey gt getvalue

32
??????????????????????????????????

???????? end
??????????????? void end (array arr)
?????????????????????? pointer ???????????????????
??????????????????????????????????????????????????
???????????????????????

33
??????????????????????????????????

sort array ( 50, 40, 30, 20 )
echo current(sort).ltbrgt// ??????? 50
end(sort) // ?????? pointer
?????????????????????
echo current(sort) // ??????? 20

34
??????????????????????????????????

???????? key
??????????????????????? mixed key (array arr)
??????????????????????????????????????????????????
??? pointer ?????????????????????????????????????
?????????????????????

35
??????????????????????????????????

sort array (startgt50,40,30,stopgt20)
echo key(sort).ltbrgt //
??????????????????????? pointer ???????
end(sort) // ?????? pointer
???????????????????
echo key(sort) // ???????????????????????
pointer ???????

36
??????????????????????????????????

???????? list
??????????????? void list (var1,var2,)
??????????????????????????????????????????????????
??????????????????? (var1,var2,)
??????????????????????????????????????????????????
??????????????????????????????????????????????????
?

37
??????????????????????????????????

arr array(Agt10,Bgt20,Cgt30)
while (list(key,data)each(arr))
echo key gtdataltbrgt

38
??????????????????????????????????

???????? next
??????????????? mixed next(array arr)
?????????????????????? pointer ???????????????????
???????????????????????????????

39
??????????????????????????????????

sort array(50,40,30,20)
echo current(sort).ltbrgt //
?????????????????????
next(sort) // ?????? pointer
???????????????????
echo current(sort) // ?????????????????????????
? pointer

40
??????????????????????????????????

???????? prev
??????????????? mixed prev (array arr)
?????????????????????? pointer ???????????????????
?????????????????????????? pointer
???????????????????????????

41
??????????????????????????????????

sort array(50,40,30,20)
echo current(sort).ltbrgt //
?????????????????????
next(sort) // ?????? pointer
???????????????????????????
echo current(sort).ltbrgt //
?????????????????????????? pointer
prev(sort) // ?????? pointer
????????????????????????????????
echo current(sort) // ?????????????????????????
? pointer

42
??????????????????????????????????

???????? reset
??????????????? void reset (array arr)
???????????????????????????????? pointer
??????????????????????????????????????????????????
???????????????????? pointer ?????????????????????
????

43
??????????????????????????????????